This new episode takes DCI Vera Stanhope on a chilling investigation as she finds herself drawn to the enchanting tidal island of Lindisfarne, where a group of lifelong friends reunites every five years to commemorate their enduring bond.What began as a joyous tradition turns sad when one of the friends is discovered dead. The tragic death takes a disturbing turn when Vera discovers that the victim had recently been fired amidst allegations of misconduct. Determined to unearth the truth, Vera delves into the past, questioning the events that transpired during their first reunion on Holy Island.

As the tide rises, long-concealed secrets begin to surface, threatening to engulf everyone involved. Vera, aided by her trusted and resourceful team, including Detective Sergeant Aiden Healy, navigates treacherous waters, facing danger and deception at every turn. Together, they must unravel the twisted web of lies before another tragedy unfolds.